<wfs:GetFeature service="WFS" version="1.0.0"
  outputFormat="GML2" xmlns:topp="http://www.openplans.org/topp"
  xmlns:wfs="http://www.opengis.net/wfs" xmlns:ogc="http://www.opengis.net/ogc"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.opengis.net/wfs 
                              http://schemas.opengis.net/wfs/1.0.0/WFS-basic.xsd">
  <wfs:Query typeName="topp:states">
    <ogc:Filter>
      <ogc:FeatureId fid="states.1" />
    </ogc:Filter>
  </wfs:Query>
</wfs:GetFeature>